Glencoe Earth Science

Chapter 4: Rocks

Rocks

1
Why are some rocks called intermediate rocks?
A)They are formed within felsic and mafic rocks.
B)They have mineral compositions between felsic and mafic rocks.
C)They are found between felsic and mafic rocks.
D)Their size is generally smaller than felsic, but larger than mafic rocks.
2
How is shale transformed into slate?
A)Shale collects at the bottom of lakes.
B)Shale cools on Earth's surface.
C)Shale undergoes intense pressure and temperature changes within Earth.
D)Shale cools within Earth's surface.
3
Felsic rocks are __________.
A)all answers are correct
B)light colored rocks
C)igneous rocks
D)rocks that have a high concentration of silica
4
A rock is a (an) __________.
A)mixture
B)element
C)compound
D)atom
5
What is rock salt used for?
A)all answers are correct
B)soap
C)glass and paper
D)diary products
6
Nonfoliated rocks__________.
A)are metamorphic and exhibit layering
B)are formed only in the northern hemisphere
C)are not classified as metamorphic
D)are metamorphic but do not exhibit layering
7
What does the term <i>rock removal</i> mean?
A)Rock carried away by the wind or water is lost from Earth forever.
B)The rock cycle removes rock by creating or destroying matter.
C)Chemical elements that make up minerals and rocks are destroyed through erosion.
D)Rock may be carried away by the wind or water, but it is never lost.
8
Sedimentary rocks __________.
A)form when sediment is pressed together
B)all answers are correct
C)form from existing rocks
D)often form in layers
9
When minerals act like glue to hold sediments together this is called __________.
A)filtration
B)fermentation
C)mineralization
D)cementation
10
Extrusive rocks __________.
A)have large mineral grains and are formed on top of Earth's surface
B)have large mineral grains and are formed beneath Earth's surface
C)have small mineral grains and are formed on top of Earth's surface
D)have small mineral grains and are formed beneath Earth's surface
11
A metamorphic rock with a foliated texture _________
A)has mineral grains that have lined up in parallel lines
B)has mineral grains that have lined up in diagonal lines
C)has mineral grains that form no distinct pattern
D)has mineral grains that have lined up perpendicular to each other.
12
Why do chemical sedimentary rocks have a non-clastic texture?
A)because they are made from igneous rocks
B)because they are made from volcanic rock
C)because they're not made from pieces of other rocks
D)because they are made from pieces of other rocks
13
Igneous rocks can be __________.
A)neither extrusive nor intrusive
B)intrusive or extrusive
C)only intrusive
D)only extrusive
14
Why can't humans just make more fossil fuels like coal?
A)because coal is formed from synthetic materials that humans don't have access to
B)because coal is formed over millions of years of compacting materials within Earth
C)because we're not sure how coal is made
D)because we're not sure what coal is made from
15
Igneous rocks __________.
A)are formed in the same way as sedimentary rocks
B)are the rarest rocks found on Earth
C)are the most commonly found rocks on Earth
D)are found mostly on the surface
16
Why does magma rise to the surface?
A)because magma is less dense than lava
B)because the rocks actually move and force the magma out
C)because magma is more dense than the surrounding rock
D)because magma is less dense than the surrounding rock
17
How are igneous rocks formed?
A)They are formed over many years of pressure and heat within Earth.
B)They are formed from cooled magma.
C)They are hot magma the moment it is expelled from a volcano.
D)They are formed from sediments that collected in ocean beds.
18
Why are mafic rocks dark?
A)because they have been scorched by high temperatures
B)because they contain large amounts iron and magnesium
C)because they contain large amounts of silica
D)because they contain large amounts of sodium
19
The rock cycle suggests that __________.
A)rocks are continually recycled into different forms
B)rocks disappear from Earth as they go underground
C)rocks always stay in the same form
D)rocks are always being added to Earth's mass
20
What are rocks that have changed due to temperature and pressure called?
A)metamorphic rocks
B)lava rocks
C)igneous rocks
D)sedimentary rocks
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